A communication system of which of the following animals is characterized by productivity? (Concentrate on the natural, rather than artificially taught, communication systems.)
The communication system of which of the following animals involves temporal displacement? (Concentrate on the natural, rather than artificially taught, communication systems.)
Which of the following properties does NOT distinguish bird songs from bird calls (i.e. which property is either possessed by both or absent from both)?
The Sally- Anne test involves a story about two dolls with a box and a basket and a marble that is put first in the basket and then in the box. The ability to pass this test reveals that the subject